Cite

Alfred Stieglitz, watercolor on paper

MLA

Stieglitz, Alfred, 1864-1946. Alfred Stieglitz, watercolor on paper. Box 156, folder 2879. n.d.. https://collections.library.yale.edu/catalog/10733712.

APA, 6th edition

Stieglitz, Alfred, 1864-1946. (["Box 156, folder 2879"])(n.d.)[Alfred Stieglitz, watercolor on paper]. https://collections.library.yale.edu/catalog/10733712.